...and clicking 'what's new' pulls up the moving activity stream first, which automatically updates as new messages are posted.
IMHO, its much better than "new posts" button on the forum tab.
I really dislike it. I can't tell what is going on and who says what to whom. I've totally quit visiting the forum except when looking for something specific. No longer fun when i have to dig through an activity stream. I miss the old "what's new".